Arresting hook



wy 23 i946; c* H. JOLLY 2,404,331"

ARRESTING Hoox Filed June 2O7 1932 E il// Y CARL A4, JULLY [/7 INVENTORld. M ATTORNEY Patented July 23, 1946 UNITED STATES PATENT OFFICE(Granted vunder the act of March 3, 1883, as amended April 30, 1928; 370`(l. vGr. 757) My invention Vrelates broadly to arresting hooks and moreparticularly to a means for accomplishing the quick release of thearresting hook of an airplane after the same has landed and engaged thetransverse retarding cables upon a restricted landing area so equipped.

The primary object of my invention being to provide an aircraft landingequipment with a quick and eicient mechanism for release of thearresting hook from engagement with the transverse retarding cable orcables of restricted landing area.

Another object of my invention is to provide a device that is rugged, oflight weight, and one that can be easily installed.

With the above and other objects in view the yinvention consists in theconstruction, combination and arrangement of parts as will be describedmore fully hereinafter.

Reference is to be had to the accompanying drawing forming a part of thespecication, in which like reference characters indicate correspendingparts throughout the several views and in which:

Figure 1 is a fragmentary side view of an airplane fuselage showing myinvention attached to an arresting hook in engagement with a portion ofan arresting cable.

Figure 2 is an enlarged detail side elevation oi the lower end of thearresting hook and associated release mechanism.

Figure 3 is a detail end view of parts shown in Figure 2 Referring moreparticularly to the drawing, ID indicates a portion of the fuselage of aconventional type of an airplane, shown more or less diagrammatically,having an arresting hook II pivotally mounted at its upper end to thefuselage as at I2, and terminating in a cable engaging member I3 at itslower end. An arresting gear retarding cable I4 is shown as engaging thethroat of member I3, and the release of the same is accomplished in theprovision of the member I5 which consists of an inverted U shaped clip,having a cable engagirg eye I6, and being pivotally mounted to the lowerend of the nose II of the member I3 by means of the pin I8.

The arresting hook I I can be raised or lowered by a cable I9 attachedto the member I5 at the eye I6, and run forward through suitable guides20 along its shank and suitable guide pulleys 2| where desired in thefuselage I0 to within con-- venient reach of the pilot where any wellknown means such as a winding drum I9a and crank I9b may be utilized forholding the same in either its extreme raised or lowered position willbe located.

When it is desired to release a retarding cable I4 from the member I3 itis only necessary to draw in on the cable I9 so that the member I5 isbrought forward under the retarding action of a compression spring 22,which will cause the cable I4 to slip from the nose Il. The broken lineposition shown in Figure 2 will indicate the cable I4 about to bereleased from the member I3.

The compression springs 212 for forcing the member I5 to its inoperativeposition are mounted on guide rods 23 at the sides thereof and guideclips 24 form a bearing for the springs 22 and locates the forward endsof the guide rods 23 along the shank of the arresting hooks.

It will be understood that the above description and accompanyingdrawing comprehend only the general and preferred embodiment of myinvention, and that various changes in construction, proportion andarrangement of parts may be within the scope of the appended claims, andwithout sacrificing any of the advantages of my invention.

The herein described invention may be manufactured and used by or forthe Government of the United States. for governmental purposes withoutthe payment to me of any royalties thereon.

What I claim is:

l. In a release mechanism for freeing an arresting hook suspended froman airplane from a transverse cable of a retarding gear, in combination,a hook, a yoked lever pivotally attached to the nose of the hook, guiderods pivotally attached to the sides of said yoked lever, actuatingsprings surrounding said guide rods, bearings for said guide rods andabutments for said springs located on the shank of said hook, and acable operated from within the airplane for throwing said yoke uponhoisting of said hook.

2. In a device for freeing the transverse retarding cable of anarresting gear from an arresting hook suspended from an airplane, a hookhaving an elongated shank pivotally mounted beneath an airplane, a yokedlever pivotally mounted upon the nose of said hook and adapted torelease the cable from the hook upon forward movement of the yoke, meansassociated between the hook and yoke for normally holding the yokeinactive, and means for manually operating said yoke to trip the cablefrom the bite of said hook.

3. In a trip release mechanism, a hook having an elongated shank forattachment terminating in a securing eye, a yoked lever pivotallymounted upon the nose of said hook and adapted to release a cable fromthe bite of said hook upon forward movement of the yoked lever, meansassociated between said hook and said yoked lever for normally holdingsaid yoke clear of the bite of said hook, and means for tripping a cablefrom said hook upon forward movement of said yoke.

4. In a trip release mechanism, a hook, an elongated shank terminatingfrom said hook, se-

curing means for said hook at the end of saidk shank, a yoke having itsends pivotally attached Y to the nose of said hook and adapted torelease a cable from the bite of said hook upon forward movement of saidyoke, means associated between said hook and said yoke for normallyholding the yoke clear of the bite of said hook and means for movingsaid yoke forward to thereby free the cable from the hook.

5. In a device for freeing a cable, a hook, levers pivotally attached tothe sides of the hook normally clear of the bite of said hook, rods piv-Vdownwardly extending bight portion terminating in a, nose, said bightportion adapted for engagement with an arresting cable, a lever having aloWer end portion pivotally supported by the hook in the vicinity of thenose thereof, said lever being swingable forwardly from an out-ofthe Wayretracted position to disengage the cable from the hook, resilient meansurging the lever Y toward. its retracted position, and means operable bythe pilot for swinging the lever forwardly to disengage the cable.l

CARL H. JOLLY.

